const tagsView = {
    state: {
        visitedViews: [],
        cachedViews: []
    },
    mutations: {
        ADD_VISITED_VIEWS: (state, view) => {
            if (state.visitedViews.some(v => v.path === view.path)) return;
            state.visitedViews.push({
                name: view.name,
                path: view.path,
                title: view.meta.title || 'no-name'
            });
            if (!view.meta.noCache) {
                state.cachedViews.push(view.name);
            }
        },
        DEL_VISITED_VIEWS: (state, view) => {
            for (const [i, v] of state.visitedViews.entries()) {
                if (v.path === view.path) {
                    state.visitedViews.splice(i, 1);
                    break;
                }
            }
            for (const i of state.cachedViews) {
                if (i === view.name) {
                    const index = state.cachedViews.indexOf(i);
                    state.cachedViews.splice(index, 1);
                    break;
                }
            }
        },
        DEL_OTHERS_VIEWS: (state, view) => {
            for (const [i, v] of state.visitedViews.entries()) {
                if (v.path === view.path) {
                    state.visitedViews = state.visitedViews.slice(i, i + 1);
                    break;
                }
            }
            for (const i of state.cachedViews) {
                if (i === view.name) {
                    const index = state.cachedViews.indexOf(i);
                    state.cachedViews = state.cachedViews.slice(index, i + 1);
                    break;
                }
            }
        },
        DEL_ALL_VIEWS: (state) => {
            state.visitedViews = [];
            state.cachedViews = [];
        }
    },
    actions: {
        addVisitedViews({ commit }, view) {
            commit('ADD_VISITED_VIEWS', view);
        },
        delVisitedViews({ commit, state }, view) {
            return new Promise((resolve) => {
                commit('DEL_VISITED_VIEWS', view);
                resolve([...state.visitedViews]);
            });
        },
        delOthersViews({ commit, state }, view) {
            return new Promise((resolve) => {
                commit('DEL_OTHERS_VIEWS', view);
                resolve([...state.visitedViews]);
            });
        },
        delAllViews({ commit, state }) {
            return new Promise((resolve) => {
                commit('DEL_ALL_VIEWS');
                resolve([...state.visitedViews]);
            });
        }
    }
};

export default tagsView;
